code: def _check_sample_belongs_to_support(self, sample, _atol):
      self.assertTrue(gs.all(sample >= 0.0))
      self.assertTrue(
          gs.all(gs.sum(sample, axis=-1) == self.space.n_draws)
      )
  
imports: import pytest
  import geomstats.backend
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.base import LevelSetTestCase
  from geomstats.test_cases.geometry.riemannian_metric import RiemannianMetricTestCase
  from geomstats.test_cases.information_geometry.base import InformationManifoldMixinTestCase
label_desc: Use image node_id 1 for calling the MultinomialDistributionsTestCase obj's underlying member method code with example usage: obj._check_sample_belongs_to_support(sample, _atol) without return types